Acanthatrium Lunatum N. Sp., a Parasite of the Big Brown Bat and a Key to the Described Species of Acanthatrium (Trematoda: Lecithodendriidae)

Trematodes of the genus Acanthatrium Faust, 1919 have frequently been found in bats I have examined but not in so great a number as other lecithodendriid flukes.Species of Acanthatrium differ from other Lecithodendriinae in that each possesses pretesticular vitellaria and a genital atrium lined with spines.The species are separated within the genus mainly on the presence or absence of an esophagus, the character of the atrial spines, and the presence or absence of cuticular spines.The known species 1 include A. sphaerula (Looss, 1896) Faust, 1919; A.